/*
 * Global colour variables.  Light mode values are set on the root,
 * dark mode overrides are defined on ``body.dark``.  Adjust these
 * values to refine the colour palette of your application.
 */

html {
  --background: #f0f2f5;
  --text: #202124;
  --card-bg: #ffffff;
  --border: #e0e0e0;
  --accent: #007bff;
  --accent-hover: #0056b3;
}

body.dark {
  --background: #0f1218;
  --text: #f5f6f8;
  --card-bg: #1a1e24;
  --border: #2c313c;
  --accent: #3399ff;
  --accent-hover: #227acc;
}

/* Generic page background for secondary pages */
body.page-bg {
  background-image: url('wallpaper.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  min-height: 100vh;
}

body.page-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  backdrop-filter: blur(3px);
  background: rgba(0, 0, 0, 0.25);
  z-index: -1;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--background);
  color: var(--text);
  transition: background 0.3s ease, color 0.3s ease;
}

/* Home screen styling */

#home-screen {
  width: 100vw;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: 60px;
  box-sizing: border-box;
  background-image: url('wallpaper.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  /* add an overlay for dark mode readability */
}

#home-screen::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  backdrop-filter: blur(3px);
  background: rgba(0, 0, 0, 0.25);
  z-index: 0;
}

#top-bar {
  position: absolute;
  top: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1;
  color: #ffffff;
}

#top-bar #time {
  font-size: 18px;
  font-weight: 600;
}

#top-bar #dark-toggle {
  background: rgba(0, 0, 0, 0.4);
  border: none;
  border-radius: 20px;
  padding: 6px 12px;
  color: #ffffff;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.2s;
}

#top-bar #dark-toggle:hover {
  background: rgba(0, 0, 0, 0.6);
}

#top-bar #logout-btn {
  background: rgba(0, 0, 0, 0.4);
  border: none;
  border-radius: 20px;
  padding: 6px 12px;
  color: #ffffff;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.2s;
}

#top-bar #logout-btn:hover {
  background: rgba(0, 0, 0, 0.6);
}

#top-bar #change-pass-btn {
  background: rgba(0, 0, 0, 0.4);
  border: none;
  border-radius: 20px;
  padding: 6px 12px;
  color: #ffffff;
  cursor: pointer;
  font-size: 16px;
  transition: background 0.2s;
}

#top-bar #change-pass-btn:hover {
  background: rgba(0, 0, 0, 0.6);
}

#icons-grid {
  width: 90%;
  max-width: 800px;
  margin: 0 auto;
  margin-top: 80px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
  gap: 20px;
  position: relative;
  z-index: 1;
}

.icon-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  border-radius: 20px;
  padding: 14px;
  cursor: pointer;
  color: #ffffff;
  transition: transform 0.1s ease;
}

.icon-tile:hover {
  transform: scale(1.05);
}

.icon-tile img {
  width: 40px;
  height: 40px;
  margin-bottom: 6px;
}

.icon-tile span {
  font-size: 14px;
  text-align: center;
}

/* To‑do list page */

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

header h1 {
  font-size: 20px;
  margin: 0;
}

header button {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 16px;
  cursor: pointer;
  padding: 6px 10px;
}

header button:hover {
  text-decoration: underline;
}

/* Logout button for secondary pages (todo, crypto, admin) */
header .logout-btn {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 16px;
  cursor: pointer;
  padding: 6px 8px;
}
header .logout-btn:hover {
  text-decoration: underline;
}

#categories-container {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}

.category-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  position: relative;
}

.category-card h2 {
  margin: 0 0 8px 0;
  font-size: 18px;
  font-weight: 600;
}

.task-item {
  display: flex;
  align-items: center;
  margin-bottom: 6px;
}

.task-item input[type='checkbox'] {
  margin-right: 10px;
  transform: scale(1.2);
}

.task-item span {
  flex: 1;
  font-size: 15px;
}

.task-item span.done {
  text-decoration: line-through;
  opacity: 0.6;
}

.task-item button {
  background: none;
  border: none;
  color: var(--accent);
  cursor: pointer;
  font-size: 16px;
  margin-left: 6px;
}

.task-item button:hover {
  color: var(--accent-hover);
}

.category-card .controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
}

.category-card .controls input {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--background);
  color: var(--text);
  font-size: 14px;
}

.category-card .controls button {
  margin-left: 6px;
  padding: 6px 10px;
  font-size: 14px;
  border-radius: 8px;
  border: none;
  cursor: pointer;
}

.category-card .controls button.add-task {
  background: var(--accent);
  color: #ffffff;
}

.category-card .controls button.delete-cat {
  background: #dc3545;
  color: #ffffff;
}

#add-category-container {
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

#add-category-container input {
  flex: 1;
  max-width: 300px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  background: var(--card-bg);
  color: var(--text);
}

#add-category-container button {
  padding: 8px 14px;
  font-size: 15px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
}

#add-category-container button:hover {
  background: var(--accent-hover);
}

/* Crypto page styles */

#crypto-list {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.crypto-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  display: flex;
  flex-direction: column;
}

.crypto-card h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
}

.crypto-card .symbol {
  font-size: 14px;
  opacity: 0.7;
}

.crypto-card .price {
  margin-top: 8px;
  font-size: 22px;
  font-weight: 700;
}

.crypto-card .change {
  font-size: 14px;
  margin-top: 4px;
}

.crypto-card .remove-btn {
  margin-top: 10px;
  align-self: flex-start;
  background: #dc3545;
  color: #ffffff;
  border: none;
  padding: 6px 10px;
  font-size: 14px;
  border-radius: 8px;
  cursor: pointer;
}

.crypto-card .remove-btn:hover {
  background: #bd2130;
}

/* Mini chart inside a crypto card */
.crypto-card canvas {
  margin-top: 8px;
  width: 100%;
  height: auto;
}

#add-crypto {
  padding: 20px;
  max-width: 500px;
  margin: 0 auto;
}

#crypto-search {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
  background: var(--card-bg);
  color: var(--text);
}

#search-results {
  margin-top: 5px;
  border: 1px solid var(--border);
  border-radius: 8px;
  max-height: 200px;
  overflow-y: auto;
  background: var(--card-bg);
  display: none;
}

#search-results div {
  padding: 8px 10px;
  cursor: pointer;
}

#search-results div:hover {
  background: var(--background);
}

/* ------------------------------------------------------------------
   Connexion page
   ------------------------------------------------------------------ */
body.login {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
  background: var(--background);
  margin: 0;
}

.login-container {
  background: var(--card-bg);
  padding: 40px 30px;
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  min-width: 300px;
}

.login-container h1 {
  margin-top: 0;
  margin-bottom: 20px;
  text-align: center;
}

.login-container input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 16px;
  background: var(--background);
  color: var(--text);
}

.login-container button {
  width: 100%;
  padding: 10px 12px;
  font-size: 16px;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  cursor: pointer;
}

.login-container button:hover {
  background: var(--accent-hover);
}

.login-container .error {
  color: #dc3545;
  font-size: 14px;
  margin-bottom: 10px;
  text-align: center;
}

/* ------------------------------------------------------------------
   Administration page
   ------------------------------------------------------------------ */
body.admin {
  background: var(--background);
  color: var(--text);
  min-height: 100vh;
}

#admin-container {
  padding: 20px;
}

#user-list-section ul {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

#user-list-section li {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--card-bg);
}

#create-user-section {
  margin-top: 20px;
  max-width: 400px;
}

#create-user-section input,
#create-user-section select {
  width: 100%;
  margin-bottom: 10px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--card-bg);
  color: var(--text);
  font-size: 16px;
}

#create-user-section button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

#create-user-section button:hover {
  background: var(--accent-hover);
}

#create-user-section .error {
  color: #dc3545;
  font-size: 14px;
  margin-top: 6px;
}